AutoCodes – Scion – P0330 Scion

P0330 Scion Code - Knock Sensor 1 Circuit Bank 2 Or Single Cylinder

Quick Answer

The knock sensor is attached to the cylinder block. Common causes include Faulty Knock Sensor, Knock Sensor circuit poor electrical connection, Knock Sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0330 Scion indicates Knock Sensor 1 Circuit Bank 2 Or Single Cylinder.
Common causes: Common causes include Faulty Knock Sensor, Knock Sensor circuit poor electrical connection, Knock Sensor harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 3,219

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 16, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0330 Scion Description

The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Engine Control Module (ECM).

OBDII Code P0330 Scion - Knock Sensor 1 Circuit Bank 2 Or Single Cylinder - AutoCodes.com — P0330 Scion Code - Knock Sensor 1 Circuit Bank 2 Or Single Cylinder

What does this mean?

What are the Possible Causes of the DTC P0330 Scion?

Faulty Knock Sensor
Knock Sensor circuit poor electrical connection
Knock Sensor harness is open or shorted
Faulty Engine Control Module (ECM)

How to Fix the DTC P0330 Scion?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

The P0330 code means that the Knock Sensor is not working properly. Problems with the knock sensor will not cause an engine performance problems. Replacing the knock sensor usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0330 Scion code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0330 Scion Code

What does the OBD-II code P0330 mean for a Scion?

P0330 indicates a malfunction in the Knock Sensor 1 Circuit on Bank 2 or a single-cylinder engine, meaning the ECM detects an issue with how the knock sensor monitors engine vibrations.

What are the common symptoms of code P0330 in a Scion?

Symptoms may include a check engine light, poor engine performance, reduced fuel efficiency, engine knocking or pinging sounds, and difficulty accelerating.

What causes the P0330 code to appear on a Scion?

Common causes include a faulty knock sensor, damaged sensor wiring, loose or corroded electrical connections, engine mechanical issues, or a malfunctioning ECM.

Can I drive my Scion with a P0330 code?

While you may be able to drive the car, it is not recommended as ignoring the issue could lead to engine damage due to uncontrolled knocking or pinging.

How do I diagnose the P0330 code on a Scion?

Diagnose by scanning the ECM for stored codes, inspecting the knock sensor and wiring for damage, testing the sensor’s resistance, and checking for proper voltage and ground connections.

How do I fix the P0330 code on a Scion?

Repairs may include replacing the faulty knock sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or in rare cases, replacing the ECM.

What is a knock sensor, and why is it important?

A knock sensor detects abnormal engine vibrations (knocks or pings) caused by pre-ignition or detonation, helping the ECM adjust timing to prevent engine damage.

How much does it cost to repair a P0330 code on a Scion?

Repair costs vary but typically range from $150 to $400, depending on whether the knock sensor, wiring, or other components need replacement.

Can a dirty or low-quality fuel cause the P0330 code?

Yes, using low-octane or contaminated fuel can cause engine knocking, which may trigger the P0330 code if the knock sensor detects persistent vibrations.

Do I need to reset the ECU after fixing the P0330 code?

Yes, after repairs, clearing the code with an OBD-II scanner and test-driving the vehicle to ensure the issue is resolved is recommended.